论文部分内容阅读
本文提出的方法,能在各种常用的拟合准则下,求得单一重现期公式i=A/(t+b)~n参数A、b、n的最佳解和各重现期统一公式i=CP~d/(t+b)~n与i=c(1+dlogP)/(t+b)~n参数c、d、b、n的最佳解。该方法是通过近似变换,将解多元超越方程组问题转为解线性方程组和一元超越方程,以便较方便、可靠地得到近似解,然后再在近似解附近找到最佳解。经过对不同城市几十组i-t-P表数据的计算,本文方法电算程序都能顺利地求得参数最佳解,比现行规范、手册方法和其它一些方法的结果都好。
The method proposed in this paper can obtain a single return period formula i = A / (t + b) ~ n parameters A, b, n under the various commonly used fitting criteria, the best solution and the unified return period The formula i = CP ~ d / (t + b) ~ n and i = c (1 + dlogP) / (t + b) ~ n parameters c, d, b, n the best solution. This method transforms the solution of multivariate transcendental equations into a solution of linear equations and a unitary transcendental equation by approximate transformation, so as to obtain an approximate solution more conveniently and reliably, and then find an optimal solution near the approximate solution. After calculations of dozens of i-t-P tables in different cities, the proposed method can successfully obtain the optimal solution of the parameters, which is better than the current specifications, manual methods, and other methods.